diff --git a/lib/doc/de/Additional.lyx b/lib/doc/de/Additional.lyx
index 3e9205d8db..f257bd4526 100644
--- a/lib/doc/de/Additional.lyx
+++ b/lib/doc/de/Additional.lyx
@@ -1,5 +1,5 @@
 #LyX 2.5 created this file. For more info see https://www.lyx.org/
-\lyxformat 626
+\lyxformat 620
 \begin_document
 \begin_header
 \save_transient_properties true